Jehovah's witnesses. When you are blocked by opposers, does that mean that they surrender?

I'm starting to notice that a few of the regular JW opposers don't want me answering their questions anymore. What is it that they could possibly be afraid of? Are they afraid of someone countering the false doctrine they spout? Do they want to be able to sway those who are weak minded about the truth without interruption? Does that mean that I win?